Possible Mucocele??

Hi, im 17 years old and have recently noticed a small bump on teh inside of my lower lip. I began freaking out immediately as i have been using dip (tobacco) for about a year and a half or so. I did not do it a lot but the fact is that i still did do it so its in the back of mi mind. Because of this any small bump in my mouth i immediately think is cancer. However, wen i read about what a mucocele is it sounds like this could be wat i have. I read you can get a mucocele from trauma against your lip, or sucking or biting too much on your lip. This sounds like dip could def lead to one of these as you suck on the tobacco and it rubs against your gum. The bump itself is fairly small and painless, but is annoying. I find myself constantly playing with it either with my tounge or my fingers. The bump has a white top to it (like a pimple) adn i have been wripping it off. Its not clear or blister looking (like pics from online) but looks more like a pimple becasue of the white head. I have also had the bump for almost 3 weeks now, has gotten smaller but not by a lot. Does anyone kno if this sounds like a mucocele?